Soft electronics have attracted much attention due to
their conformal
flexibility with skin tissue. In this work, soft and stretchable conductive
fabrics were prepared based on the interface design of a poly(styrene-ethylene/butylene-styrene)
(SEBS) thermoplastic elastomer and silver nanowires (AgNWs). AgNWs
with a diameter of 200 nm, high aspect ratio, and high conductivity
were prepared by a polyol reduction method. The amphiphilic triblock
copolymer poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene
oxide) (PEO-PPO-PEO) was used to improve the wettability of SEBS electrospun
fibers. According to the solubility parameters, hot ethanol was chosen
to post-treat the electrospun fabrics to induce the migration of the
hydrophilic PEO blocks to the outer layer of the fibers so that dopamine
was uniformly polymerized on the surface of the hydrophilic SEBS.
AgNWs can uniformly and flexibly bind to the surface of SEBS@PDA fibers.
Our study provides a simple and controllable approach to realizing
stable large-strain soft stretchable electronics and exhibits great
potential in human skin extension applications.